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General Description

The MAX8722 integrated backlight controller is optimized to drive cold-cathode fluorescent lamps (CCFLs) using a full-bridge resonant inverter architecture. Resonant operation maximizes striking capability and provides near-sinusoidal waveforms over the entire input range to improve CCFL lifetime. The controller operates over a wide input voltage range (4.6V to 28V) with high power to light efficiency. The device also includes safety features that effectively protect against many single-point fault conditions including lamp-out and short-circuit faults.

Features

? Synchronized to Resonant Frequency

??? Longer Lamp Life

??? Guaranteed Striking Capability

??? High Power to Light Efficiency

? Wide Input Voltage Range (4.6V to 28V)

? Input-Voltage Feed-Forward for Excellent Line Rejection

? Accurate Dimming Control with Analog Interface

? 10:1 Dimming Range

? Adjustable Accurate DPWM Frequency with Sync Function

? Adjustable Lamp Current Rise and Fall Time

? Secondary Voltage Limit Reduces Transformer Stress

? Lamp-Out Protection with Adjustable Timeout

? Secondary Overcurrent Protection with Adjustable Timeout

? Low-Cost 24-Pin QSOP Package

Applications

??? Notebook Computer Displays

??? LCD Monitors

??? LCD TVs